AC Milan coach Carlo Ancelotti says he expects Tuesday's Champions League semi-final, first-leg against Barcelona to be a real battle and promises his side will not worry about conceding a goal.

Last time the two clubs met at the San Siro, in October 2004, Milan won 1-0 in a group stage game. While Ancelotti would settle for such a result again, he says there will be no calculating approach from the Italian side.

"A 1-0 win is a good result given that you don't concede an 'away goal' to them but the really important thing is to win," said the Milan coach.

"Our worry is not about conceding a goal -- the more important thing is about the approach to the game and having the courage to impose yourself -- that is vital for both sides."

Ronaldinho presents the biggest threat to Milan's 13-match Champions League unbeaten home record but Ancelotti says he will not place a man-marker on the Brazilian.

"We have never gone man-to-man but he'll be controlled though -- at least I hope so," Ancelotti said.